Veille CVE
CVE-2026-42055
8.1 ÉlevéeDescription
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module and ngx_http_grpc_module modules. This vulnerability exists when the proxy_http_version to 2 or grpc_pass directives are used to proxy HTTP/2 traffic, the ignore_invalid_headers directive is set to off, and the large_client_header_buffers directive size is larger than 2 megabytes. A remote, unauthenticated attacker, along with conditions beyond their control, could send large headers while creating an upstream request. This may cause a heap-based buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Produits concernés
- F5 NGINX Open Source
- F5 NGINX Plus
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Discovery 2
- Red Hat Hardened Images
- Red Hat Update Infrastructure 5
- Red Hat Openshift Data Foundation 4
- F5 dos
- F5 nginx gateway fabric
- F5 nginx ingress controller
- F5 nginx instance manager
- F5 waf
- Redhat discovery
- Redhat hardened images
- Redhat update infrastructure
- Redhat enterprise linux
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 4.0 | 9.2 Critique | f5sirt@f5.com | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| 3.1 | 8.1 Élevée | f5sirt@f5.com | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 8.1 Élevée | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Faiblesses (CWE)
Références
- https://my.f5.com/manage/s/article/K000161584 Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:27197 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36331 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36364 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36618 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36639 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:38847 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:44481 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:46836 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:58981
- https://access.redhat.com/security/cve/CVE-2026-42055 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2489866 Issue TrackingThird Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42055.json Third Party Advisory